1 #ifndef _PDCLIB_CONFIG_H
2 #define _PDCLIB_CONFIG_H
4 /* Internal PDCLib configuration <_PDCLIB_config.h>
7 This file is part of the Public Domain C Library (PDCLib).
8 Permission is granted to use, modify, and / or redistribute at will.
11 /* -------------------------------------------------------------------------- */
13 /* -------------------------------------------------------------------------- */
15 /* The character (sequence) your platform uses as newline. */
16 #define _PDCLIB_endl "\r\n"
18 /* exit() can signal success to the host environment by the value of zero or */
19 /* the constant EXIT_SUCCESS. Failure is signaled by EXIT_FAILURE. Note that */
20 /* any other return value is "implementation-defined", i.e. your environment */
21 /* is not required to handle it gracefully. Set your definitions here. */
22 #define _PDCLIB_SUCCESS 0
23 #define _PDCLIB_FAILURE -1
25 /* qsort() in <stdlib.h> requires a function that swaps two memory areas. */
26 /* Below is a naive implementation that can be improved significantly for */
27 /* specific platforms, e.g. by swapping int instead of char. */
28 #define _PDCLIB_memswp( i, j, size ) char tmp; do { tmp = *i; *i++ = *j; *j++ = tmp; } while ( --size );
30 /* -------------------------------------------------------------------------- */
32 /* -------------------------------------------------------------------------- */
33 /* Assuming 8-bit char, two's-complement architecture here. 'short' being */
34 /* 16 bit, 'int' being either 16, 32 or 64 bit, 'long' being either 32 or 64 */
35 /* bit (but 64 bit only if 'int' is 32 bit), and 'long long' being 64 bit if */
36 /* 'long' is not, 64 or 128 bit otherwise. */
37 /* Author is quite willing to support other systems but would like to hear of */
38 /* interest in such support and details on the to-be-supported architecture */
39 /* first, before going to lengths about it. */
40 /* -------------------------------------------------------------------------- */
42 /* Comment out (or delete) the line below if your 'char' type is unsigned. */
43 #define _PDCLIB_CHAR_SIGNED 1
45 /* Width of the integer types short, int, long, and long long, in bytes. */
46 /* SHRT == 2, INT >= SHRT, LONG >= INT >= 4, LLONG >= LONG - check your */
47 /* compiler manuals. */
48 #define _PDCLIB_SHRT_BYTES 2
49 #define _PDCLIB_INT_BYTES 4
50 #define _PDCLIB_LONG_BYTES 4
51 #define _PDCLIB_LLONG_BYTES 8
53 /* <stdlib.h> defines the div() function family that allows taking quotient */
54 /* and remainder of an integer division in one operation. Many platforms */
55 /* support this in hardware / opcode, and the standard permits ordering of */
56 /* the return structure in any way to fit the hardware. That is why those */
57 /* structs can be configured here. */
71 struct _PDCLIB_lldiv_t
77 /* -------------------------------------------------------------------------- */
78 /* <stdint.h> defines a set of integer types that are of a minimum width, and */
79 /* "usually fastest" on the system. (If, for example, accessing a single char */
80 /* requires the CPU to access a complete int and then mask out the char, the */
81 /* "usually fastest" type of at least 8 bits would be int, not char.) */
82 /* If you do not have information on the relative performance of the types, */
83 /* the standard allows you to define any type that meets minimum width and */
84 /* signedness requirements. */
85 /* The defines below are just configuration for the real typedefs and limit */
86 /* definitions done in <_PDCLIB_int.h>. The uppercase define shall be either */
87 /* SHRT, INT, LONG, or LLONG (telling which values to use for the *_MIN and */
88 /* *_MAX limits); the lowercase define either short, int, long, or long long */
89 /* (telling the actual type to use). */
90 /* The third define is the length modifier used for the type in printf() and */
91 /* scanf() functions (used in <inttypes.h>). */
92 /* If you require a non-standard datatype to define the "usually fastest" */
93 /* types, PDCLib as-is doesn't support that. Please contact the author with */
94 /* details on your platform in that case, so support can be added. */
95 /* -------------------------------------------------------------------------- */
97 #define _PDCLIB_FAST8 INT
98 #define _PDCLIB_fast8 int
99 #define _PDCLIB_FAST8_CONV
101 #define _PDCLIB_FAST16 INT
102 #define _PDCLIB_fast16 int
103 #define _PDCLIB_FAST16_CONV
105 #define _PDCLIB_FAST32 INT
106 #define _PDCLIB_fast32 int
107 #define _PDCLIB_FAST32_CONV
109 #define _PDCLIB_FAST64 LLONG
110 #define _PDCLIB_fast64 long long
111 #define _PDCLIB_FAST64_CONV ll
113 /* -------------------------------------------------------------------------- */
114 /* What follows are a couple of "special" typedefs and their limits. Again, */
115 /* the actual definition of the limits is done in <_PDCLIB_int.h>, and the */
116 /* defines here are merely "configuration". See above for details. */
117 /* -------------------------------------------------------------------------- */
119 /* The types used for size_t and ptrdiff_t should not have an integer conversion
120 rank greater than that of signed long int unless the implementation supports
121 objects large enough to make this necessary.
124 /* Result type of substracting two pointers (must be signed) */
125 #if defined(__amd64__) || defined(_M_AMD64)
126 #define _PDCLIB_ptrdiff long long
127 #define _PDCLIB_PTRDIFF LLONG
128 #define _PDCLIB_PTR_CONV ll
130 #define _PDCLIB_ptrdiff int
131 #define _PDCLIB_PTRDIFF INT
132 #define _PDCLIB_PTR_CONV
135 /* Result type of the 'sizeof' operator (must be unsigned) */
136 #if defined(__amd64__) || defined(_M_AMD64)
137 #define _PDCLIB_size unsigned long long
138 #define _PDCLIB_SIZE ULLONG
140 #define _PDCLIB_size unsigned int
141 #define _PDCLIB_SIZE UINT
144 /* An integer type that can be accessed as atomic entity (think asynchronous
145 interrupts). The type itself is not defined in a freestanding environment,
146 but its limits are. (Don't ask.)
148 #define _PDCLIB_sig_atomic int
149 #define _PDCLIB_SIG_ATOMIC INT
151 /* Object type whose alignment is as great as supported by implementation
154 #define _PDCLIB_max_align long double
156 /* Integer type whose range of values can represent distinct codes for
157 all members of the largest extended character set specified among the
159 Note that the definition of this type must agree with the type used
160 by the compiler for L"" string and L'' character literals.
162 #define _PDCLIB_wchar unsigned short
163 #define _PDCLIB_WCHAR USHRT
165 /* Each member of the basic character set shall have a code value equal
166 to its value when used as the lone character in an integer character
167 constant. If that is not the case, uncomment the following line.
168 #define __STDC_MB_MIGHT_NEQ_WC__
171 /* Integer type unchanged by default argument promotions that can hold any
172 value corresponding to characters of the extended character set, as well
173 as at least one value that does not correspond to any member of the
174 extended character set (WEOF).
176 #define _PDCLIB_wint signed int
178 #if defined(__amd64__) || defined(_M_AMD64)
179 #define _PDCLIB_intptr long long
180 #define _PDCLIB_INTPTR LLONG
182 #define _PDCLIB_intptr int
183 #define _PDCLIB_INTPTR INT
186 /* Largest supported integer type. Implementation note: see _PDCLIB_atomax(). */
187 #define _PDCLIB_intmax long long int
188 #define _PDCLIB_INTMAX LLONG
189 #define _PDCLIB_MAX_CONV ll
190 /* You are also required to state the literal suffix for the intmax type */
191 #define _PDCLIB_INTMAX_LITERAL ll
193 /* <inttypes.h> defines imaxdiv(), which is equivalent to the div() function */
194 /* family (see further above) with intmax_t as basis. */
196 struct _PDCLIB_imaxdiv_t
203 * The C standard doesn't define what representation of time is stored in
204 * time_t when returned by time() , but POSIX defines it to be seconds since the
205 * UNIX epoch and most appplications expect that.
207 * time_t is also used as the tv_sec member of struct timespec, which *is*
208 * defined as a linear count of seconds.
210 * time_t is defined as a "real type", so may be a floating point type, but with
211 * the presence of the nanosecond accurate struct timespec, and with the lack of
212 * any functions for manipulating more accurate values of time_t, this is
213 * probably not useful.
215 #define _PDCLIB_time unsigned long long
219 * A count of "clock ticks", where the length of a clock tick is unspecified by
220 * the standard. The implementation is required to provide a macro,
221 * CLOCKS_PER_SEC, which is the number of "clock ticks" which corresponds to one
224 * clock_t may be any real type (i.e. integral or floating), and its type on
225 * various systems differs.
227 * On XSI systems, CLOCKS_PER_SEC must be defined to 1000000
229 #define _PDCLIB_clock double
230 #define _PDCLIB_CLOCKS_PER_SEC 1000000
232 /* <time.h>: TIME_UTC
234 * The TIME_UTC parameter is passed to the timespec_get function in order to get
235 * the system time in UTC since an implementation defined epoch (not necessarily
236 * the same as that used for time_t). That said, on POSIX the obvious
237 * implementation of timespec_get for TIME_UTC is to wrap
238 * clock_gettime(CLOCK_REALTIME, ...), which is defined as time in UTC since the
241 * This may be any non-zero integer value.
243 #define _PDCLIB_TIME_UTC 1
245 /* -------------------------------------------------------------------------- */
247 /* -------------------------------------------------------------------------- */
249 /* Whether the implementation rounds toward zero (0), to nearest (1), toward
250 positive infinity (2), or toward negative infinity (3). (-1) signifies
251 indeterminable rounding, any other value implementation-specific rounding.
253 #define _PDCLIB_FLT_ROUNDS -1
255 /* Whether the implementation uses exact-width precision (0), promotes float
256 to double (1), or promotes float and double to long double (2). (-1)
257 signifies indeterminable behaviour, any other value implementation-specific
260 #define _PDCLIB_FLT_EVAL_METHOD -1
262 /* "Number of the decimal digits (n), such that any floating-point number in the
263 widest supported floating type with p(max) radix (b) digits can be rounded to
264 a floating-point number with (n) decimal digits and back again without change
265 to the value p(max) log(10)b if (b) is a power of 10, [1 + p(max) log(10)b]
267 64bit IEC 60559 double format (53bit mantissa) is DECIMAL_DIG 17.
268 80bit IEC 60559 double-extended format (64bit mantissa) is DECIMAL_DIG 21.
270 #define _PDCLIB_DECIMAL_DIG 17
272 /* Floating point types
274 * PDCLib (at present) assumes IEEE 754 floating point formats
275 * The following names are used:
276 * SINGLE: IEEE 754 single precision (32-bit)
277 * DOUBLE: IEEE 754 double precision (64-bit)
278 * EXTENDED: IEEE 754 extended precision (80-bit, as x87)
280 #define _PDCLIB_FLOAT_TYPE SINGLE
281 #define _PDCLIB_DOUBLE_TYPE DOUBLE
282 #define _PDCLIB_LDOUBLE_TYPE EXTENDED
284 /* -------------------------------------------------------------------------- */
285 /* Platform-dependent macros defined by the standard headers. */
286 /* -------------------------------------------------------------------------- */
288 /* The offsetof macro
289 Contract: Expand to an integer constant expression of type size_t, which
290 represents the offset in bytes to the structure member from the beginning
291 of the structure. If the specified member is a bitfield, behaviour is
293 There is no standard-compliant way to do this.
294 This implementation casts an integer zero to 'pointer to type', and then
295 takes the address of member. This is undefined behaviour but should work on
299 #define _PDCLIB_offsetof( type, member ) __builtin_offsetof( type, member )
301 #define _PDCLIB_offsetof( type, member ) ( (size_t) &( ( (type *) 0 )->member ) )
304 /* Variable Length Parameter List Handling (<stdarg.h>)
305 The macros defined by <stdarg.h> are highly dependent on the calling
306 conventions used, and you probably have to replace them with builtins of
311 typedef __builtin_va_list _PDCLIB_va_list;
312 #define _PDCLIB_va_arg( ap, type ) (__builtin_va_arg( (ap), type ))
313 #define _PDCLIB_va_copy( dest, src ) (__builtin_va_copy( (dest), (src) ))
314 #define _PDCLIB_va_end( ap ) (__builtin_va_end( ap ) )
315 #define _PDCLIB_va_start( ap, parmN ) (__builtin_va_start( (ap), (parmN) ))
316 #elif (defined(__i386__) || defined(__i386) || defined(_M_IX86)) && !(defined(__amd64__) || defined(__x86_64__) || defined(_M_AMD64))
317 /* Internal helper macro. va_round is not part of <stdarg.h>. */
318 #define _PDCLIB_va_round( type ) ( (sizeof(type) + sizeof(void *) - 1) & ~(sizeof(void *) - 1) )
319 typedef char * _PDCLIB_va_list;
320 #define _PDCLIB_va_arg( ap, type ) ( (ap) += (_PDCLIB_va_round(type)), ( *(type*) ( (ap) - (_PDCLIB_va_round(type)) ) ) )
321 #define _PDCLIB_va_copy( dest, src ) ( (dest) = (src), (void)0 )
322 #define _PDCLIB_va_end( ap ) ( (ap) = (void *)0, (void)0 )
323 #define _PDCLIB_va_start( ap, parmN ) ( (ap) = (char *) &parmN + ( _PDCLIB_va_round(parmN) ), (void)0 )
325 #error Compiler/Architecture support please
328 /* -------------------------------------------------------------------------- */
329 /* OS "glue", part 1 */
330 /* These are values and data type definitions that you would have to adapt to */
331 /* the capabilities and requirements of your OS. */
332 /* The actual *functions* of the OS interface are declared in _PDCLIB_glue.h. */
333 /* -------------------------------------------------------------------------- */
335 /* Memory management -------------------------------------------------------- */
337 /* Set this to the page size of your OS. If your OS does not support paging, set
338 to an appropriate value. (Too small, and malloc() will call the kernel too
339 often. Too large, and you will waste memory.)
341 #define _PDCLIB_MALLOC_PAGESIZE 4096
342 #define _PDCLIB_MALLOC_ALIGN 16
343 #define _PDCLIB_MALLOC_GRANULARITY 64*1024
344 #define _PDCLIB_MALLOC_TRIM_THRESHOLD 2*1024*1024
345 #define _PDCLIB_MALLOC_MMAP_THRESHOLD 256*1024
346 #define _PDCLIB_MALLOC_RELEASE_CHECK_RATE 4095
348 /* TODO: Better document these */
350 /* Locale --------------------------------------------------------------------*/
352 /* Locale method. See _PDCLIB_locale.h. If undefined, POSIX per-thread locales
355 #define _PDCLIB_LOCALE_METHOD _PDCLIB_LOCALE_METHOD_TSS
357 /* wchar_t encoding */
358 #define _PDCLIB_WCHAR_ENCODING _PDCLIB_WCHAR_ENCODING_UTF16
360 /* I/O ---------------------------------------------------------------------- */
362 /* The default size for file buffers. Must be at least 256. */
363 #define _PDCLIB_BUFSIZ 1024
365 /* The minimum number of files the implementation can open simultaneously. Must
366 be at least 8. Depends largely on how the bookkeeping is done by fopen() /
367 freopen() / fclose(). The example implementation limits the number of open
368 files only by available memory.
370 #define _PDCLIB_FOPEN_MAX 8
372 /* Length of the longest filename the implementation guarantees to support. */
373 #define _PDCLIB_FILENAME_MAX 260
375 /* Maximum length of filenames generated by tmpnam(). (See tmpfile.c.) */
376 #define _PDCLIB_L_tmpnam 260
378 /* Number of distinct file names that can be generated by tmpnam(). */
379 #define _PDCLIB_TMP_MAX 50
381 /* The values of SEEK_SET, SEEK_CUR and SEEK_END, used by fseek().
382 Since at least one platform (POSIX) uses the same symbols for its own "seek"
383 function, we use whatever the host defines (if it does define them).
385 Win32 note: Must match Win32 API values (FILE_BEGIN/FILE_CURRENT/FILE_END)
387 #define _PDCLIB_SEEK_SET 0
388 #define _PDCLIB_SEEK_CUR 1
389 #define _PDCLIB_SEEK_END 2
391 /* The number of characters that can be buffered with ungetc(). The standard
392 guarantees only one (1); anything larger would make applications relying on
393 this capability dependent on implementation-defined behaviour (not good).
395 #define _PDCLIB_UNGETCBUFSIZE 1
397 /* errno -------------------------------------------------------------------- */
399 /* These are the values that _PDCLIB_errno can be set to by the library.
401 By keeping PDCLib's errno in the _PDCLIB_* namespace, the library is capable
402 to "translate" between errno values used by the hosting operating system and
403 those used and passed out by the library.
405 Example: In the example platform, the remove() function uses the unlink()
406 system call as backend. Linux sets its errno to EISDIR if you try to unlink()
407 a directory, but POSIX demands EPERM. Within the remove() function, you can
408 catch the 'errno == EISDIR', and set '_PDCLIB_errno = _PDCLIB_EPERM'. Anyone
409 using PDCLib's <errno.h> will "see" EPERM instead of EISDIR (the _PDCLIB_*
410 prefix removed by <errno.h> mechanics).
412 If you do not want that kind of translation, you might want to "match" the
413 values used by PDCLib with those used by the host OS, as to avoid confusion.
415 The C standard only defines three distinct errno values: ERANGE, EDOM, and
416 EILSEQ. The standard leaves it up to "the implementation" whether there are
417 any more beyond those three.
419 However, C++11 introduced the whole list of POSIX errno values into the
420 standard, so PDCLib might as well define those as well.
422 Sometimes the standard says to set errno to indicate an error, but does not
423 prescribe a value. We will use a value from the following list. If POSIX
424 defines a value, we use that; otherwise, we use as seems suitable.
427 /* These values were taken from Windows 7, MSVC 2010. */
428 #define _PDCLIB_E2BIG 7
429 #define _PDCLIB_EACCES 13
430 #define _PDCLIB_EADDRINUSE 100
431 #define _PDCLIB_EADDRNOTAVAIL 101
432 #define _PDCLIB_EAFNOSUPPORT 102
433 #define _PDCLIB_EAGAIN 11
434 #define _PDCLIB_EALREADY 103
435 #define _PDCLIB_EBADF 9
436 #define _PDCLIB_EBADMSG 104
437 #define _PDCLIB_EBUSY 16
438 #define _PDCLIB_ECANCELED 105
439 #define _PDCLIB_ECHILD 10
440 #define _PDCLIB_ECONNABORTED 106
441 #define _PDCLIB_ECONNREFUSED 107
442 #define _PDCLIB_ECONNRESET 108
443 #define _PDCLIB_EDEADLK 36
444 #define _PDCLIB_EDESTADDRREQ 109
445 #define _PDCLIB_EDOM 33
446 #define _PDCLIB_EEXIST 17
447 #define _PDCLIB_EFAULT 14
448 #define _PDCLIB_EFBIG 27
449 #define _PDCLIB_EHOSTUNREACH 110
450 #define _PDCLIB_EIDRM 111
451 #define _PDCLIB_EILSEQ 42
452 #define _PDCLIB_EINPROGRESS 112
453 #define _PDCLIB_EINTR 4
454 #define _PDCLIB_EINVAL 22
455 #define _PDCLIB_EIO 5
456 #define _PDCLIB_EISCONN 113
457 #define _PDCLIB_EISDIR 21
458 #define _PDCLIB_ELOOP 114
459 #define _PDCLIB_EMFILE 24
460 #define _PDCLIB_EMLINK 31
461 #define _PDCLIB_EMSGSIZE 115
462 #define _PDCLIB_ENAMETOOLONG 38
463 #define _PDCLIB_ENETDOWN 116
464 #define _PDCLIB_ENETRESET 117
465 #define _PDCLIB_ENETUNREACH 118
466 #define _PDCLIB_ENFILE 23
467 #define _PDCLIB_ENOBUFS 119
468 #define _PDCLIB_ENODATA 120
469 #define _PDCLIB_ENODEV 19
470 #define _PDCLIB_ENOENT 2
471 #define _PDCLIB_ENOEXEC 8
472 #define _PDCLIB_ENOLCK 39
473 #define _PDCLIB_ENOLINK 121
474 #define _PDCLIB_ENOMEM 12
475 #define _PDCLIB_ENOMSG 122
476 #define _PDCLIB_ENOPROTOOPT 123
477 #define _PDCLIB_ENOSPC 28
478 #define _PDCLIB_ENOSR 124
479 #define _PDCLIB_ENOSTR 125
480 #define _PDCLIB_ENOSYS 40
481 #define _PDCLIB_ENOTCONN 126
482 #define _PDCLIB_ENOTDIR 20
483 #define _PDCLIB_ENOTEMPTY 41
484 #define _PDCLIB_ENOTRECOVERABLE 127
485 #define _PDCLIB_ENOTSOCK 128
486 #define _PDCLIB_ENOTSUP 129
487 #define _PDCLIB_ENOTTY 25
488 #define _PDCLIB_ENXIO 6
489 #define _PDCLIB_EOPNOTSUPP 130
490 #define _PDCLIB_EOVERFLOW 132
491 #define _PDCLIB_EOWNERDEAD 133
492 #define _PDCLIB_EPERM 1
493 #define _PDCLIB_EPIPE 32
494 #define _PDCLIB_EPROTO 134
495 #define _PDCLIB_EPROTONOSUPPORT 135
496 #define _PDCLIB_EPROTOTYPE 136
497 #define _PDCLIB_ERANGE 34
498 #define _PDCLIB_EROFS 30
499 #define _PDCLIB_ESPIPE 29
500 #define _PDCLIB_ESRCH 3
501 #define _PDCLIB_ETIME 137
502 #define _PDCLIB_ETIMEDOUT 138
503 #define _PDCLIB_ETXTBSY 139
504 #define _PDCLIB_EWOULDBLOCK 140
505 #define _PDCLIB_EXDEV 18
507 /* This is used to set the size of the array in struct lconv (<locale.h>) */
508 /* holding the error messages for the strerror() and perror() fuctions. If */
509 /* you change this value because you are using additional errno values, you */
510 /* *HAVE* to provide appropriate error messages for *ALL* locales. */
511 /* Needs to be one higher than the highest errno value above. */
512 #define _PDCLIB_ERRNO_MAX 141